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OPT-DPH20048-4 Strobe digital controller



OPT-DPH20048-4  manual.zip



Model No.

Product Features

1. RS232 communication

2. For strobing LED illuminations with higher brightness; the width of the output pulses can be set from 1 to 1023 µs

3. Multiple channels can be controlled simultaneously.

4. Internal self-trigger function, adjustable from 15 to 1000 ms.

5.Trigger signal input: connect an external signal source (e.g. a camera trigger signal) for synchronized strobing of  the illumination device.

6. Easy to install: screw mount or DIN rail are available .

Device Overview





5-digit display

The first number indicates the channel and the other 4 numbers show related data 


Internal / external trigger switch

EXT TRIG: External trigger INT TRIG: Internal trigger


Serial port, female

To connect with PC via RS232


AC power input

100 - 240 V AC, 50/60 Hz


Intensity adjustment

Adjusts the intensity and width of the trigger pulse


Light connector

In total, four lights can be controlled individually 


Trigger connector

For connection with an external trigger source such as a PLC,  sensor or camera



Turns the controller on/off

Connection Setup

Step 1: Refer to drawing above on how to connect the light with the controller.

Step 2: For external triggering, connect the external trigger source with the trigger port.

Step 3: Connect the controller with an 100 - 240 V AC power source and switch the controller on. 

            The digital display is lit. If the intensity of the light shall be controlled via PC, you need to 

            connect the PC with an RS232 cable or Ethernet cable before the controller is switched on. 

            Use the provided software or your own application to communicate with the controller. 

            You can adjust the settings via the PC or manually.

Parameter Descripition




Input voltage

100-240 V AC


Output voltage

48 V

External trigger

Power trigger

Output pulse width

1 - 1023 μs

Controlled by intensity adjustment key or via PC,

each channel can be adjusted with a different value

Internal trigger


Controlled by intensity adjustment key or via PC, external trigger is disabled

Internal trigger 

pulse width

15 – 1000 ms

Controlled by intensity adjustment key or via PC,

each channel can be adjusted with a different value

Short circuit protection


Protection shuts down the related channel and “ER2” appears on the display

Over current 



When the current is over 10% of set value the related channel is shut down                  and “ER1” appears on the display

Max single CH output 

flash on


Only for 24 V lights with 10 mA to 1 A input

Total output flash on




Standby power 


≤ 3.4W

Overvoltage resistance

1500 V AC, max. 1 minunte

Leak current < 10 mA

Insulation resistance

500 V DC

Insulation resistance >20 MΩ

Working temperature

-5°C - 50°C

Size [mm]

91 x 132.41 x 171 mm

Weight [kg]

1.1 kg

Trigger Port and Setup

The trigger mode of this type controller is level trigger, so the trigger mode can be achieved by high voltage trigger,

low voltage trigger, rising edge trigger and falling edge trigger, and the connection COM port is the same in the controller.

The high power trigger (input voltage range is 5V to 24V) and low power trigger (input voltage range is 0V-2V) is separated

by the dual opto-couple inside. For the rising edge trigger and falling edge trigger, normally the delivered item is rising edge trigger,

but it can be adjusted to falling edge trigger by the trigger switch key on the panel.

Sequence Diagram

Falling edge
Rising edge


T1 is the trigger delay time while T2 is the width of the trigger pulse.

T1 80 μs; T2 can be set from 1 to 1023 μs

Wiring Diagram of Two Use Cases

     Trigger Source                                   Light Controller

      Trigger Source                                       Light Controller

Trigger Input Circuit for NPN Type Trigger
Trigger Input Circuit for PNP Type Trigger

Dimensions [mm]